After the build has completed and the container is pushed to docker hub, you
can deploy the app into your cluster. Ensure that the container image value
in service.yaml matches the container you built in the previous step. Apply
the configuration using kubectl:

kubectl apply --filename service.yaml

Now that your service is created, Knative performs the following steps:

Automatically scale your pods up and down (including to zero active pods).

Run the following command to find the external IP address for your service.
The ingress IP for your cluster is returned. If you just created your
cluster, you might need to wait and rerun the command until your service gets
asssigned an external IP address.